Showing papers in "IOSR Journal of Applied Chemistry in 2019"

Analysis of Bisphenol A in drinking water bottles and babyfeeding bottles using polyaniline/Bentonite modified glassy carbon electrode biosensor

Abstract: This work sought to investigate the presence of BPA in water placed in some plastic drinking water bottles and baby feeding bottles obtained randomly in the Kenyan market using polyaniline/ bentonite modified glassy carbon electrode biosensor. The aim was to analyse the levels of BPA that leached from the bottles when water maintained at known temperature and time was analyzed. The control consisted of the same water placed in similar bottles but made of glass at the same time and temperature. The hypothesis of the work was that BPA would leach into the water from the plastic bottles. The BPA content was investigated using electrochemical methods. A calibration curve was used to determine the amount of BPA that leached in to the water. The results obtained indicated that all the bottles investigated contained immediate detectable amounts of BPA amounting to 0.030mM, 0.021 mM and 0.035mM for first, second and third drinking water bottles respectively and 0.019mM and 0.030 mM first and second feeding baby bottles respectively on average for water in the bottles kept at 70 degrees for five minutes.